Grinding-machine



No. 608,285. Patented Aug. 2,1898;

v J. E."HARVEY.'

GRINDING MACHINE.

(Application filed my. 13. 1897. (No Model.) 2 SheetsSheet I.

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I Patented 2., I898. J. E HARVEY. GRINDING MACHINE.

(Applica tion filed Inr. 13, 1897.)

2 Shaets-$heet 2.

(No Model.)

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g ddiigzsscs I UNITED STATES PATENT OFFICE.

JAMES ELMORE HARVEY, OF READFIELD, MAINE, ASSIGNOR OF ONE-HALF TO FRANK L. BRANDE, OF STARKE, MAINE.

GRINDINGFMACHINIE.

SPECIFICATION forming part of as Pate t No. 608,285, dated. August 2, 1898. Applieatimi filed March 13, 1897- Serial No. 627,344. {(1% model.)

To all whomtt may concern.- V

Beit known that I, JAMES ELMORE HARVEY, a citizen of the United States,residing at Readfield, in the county of Kennebec and State of Maine, have invented a new and useful Grinding-Machine, of which the following is a specification. a

This invention relates to grinding-machines adapted to grind the knives and guard-plates of mowing and reaping machines, common scythe-blades, the, its special objects being to provide a machine of this character in which a grinding-wheel may be adjusted to grind at any desired angleor bevel and to so construct the holders or supports that they may be used to holdor support the different articles to be ground and in such manner that theextreme sections of the article, which project beyond the holders, may be ground as readily as th intermediate section. V

With these and other objects in View the invention consists in the novel features of construction and c ombination of parts hereinafter fully described, and particularly pointed out in the claims.

In the drawings, Figure 1 is a-plan view of the machine. Fig. 2 is a side elevation. Fig. 3 is a vertical transverse section. Fig. 4: is an enlarged sectional view of the universal joint at the base of the standard which carries the grinding apparatus. Fig. 5 is a rear view, on an enlarged scale, of the upper end of one of the supports for the knives and knife-bar. Fig. 6 is an edge view of the same. Fig. 7 is a perspective View of a bracket adapted to be attached to the head of the support. Fig. 8 is a side elevation showing the bracket in position. Fig. 9 is a plan view of a portion of a'finger-bar supported on the bracket in position to havethe'fingers and guard Fig. 10 is a sectional'vieyv of ably secured on the base-plate 1 by'means of a bolt 4, which passes throughthe slot 2 and is securedin its adjusted position bya nut 5'.

The plate 3 is provided intermediate its edges with a downwardly-extending flange 6, which bears against the side of the base-plate 1. The part of the plate 3 which extends beyond the base-plate 1 is perforated for the reception of a bolt 7, and it supports 'a washer 8, which is provided with a convex recess 9, in which the rounded lower end 10 of the standard 11 is seated. The lower end of the standard is also hollowed out, as indicated at 12, to receive the semispherical washer 13, through which the bolt 7 passes, and the head of the bolt rests upon the flat surface of the washer. In this manner a universal joint is provided on which the standard 11 may beturned in any direction, and by tightening up the nut 14 on the bolt 7 the standard can be clamped on the plate 3 in any desired position. The upper end of the standard is bifurcated to form two 7o arms 15 and 16, which are bored out to form bearings for the sleeve 17'and shaft 18, respectively. The sleeve 17 carries the grinding-wheel 19, which may be of emery or any other suitable abrading material."

The shaft 18 is larger in diameter at one end than it is at'the other, and the sleeve 17 fits over the larger end of the shaft 18, and the sleeve is provided withja slot 20, through which a stud 21 passes into the shaft 18. The sleeve will thereforetu rn with the shaft '18, but is free to have a limited longitudinal movement on the shaft. The smaller end of thelshaft 18 is journaled in the arm 16, and the shoulder '22 on the shaft bears against theinner face of the arm '16. The shaft 18 projects beyond the arm lfi and carries a sprocket-wheel 23,- which is secured thereon by means of a spring-key 24; or, other suitable locking device, which passes through the hub 25of the sprocket w heel' and the shaft 18. The hub is thus connected to the shaft, and the shaft is held in position -by the locking device 24, and it willbe readily seen that by simply removing the spring-key 24 the sleeve 17 and shaft 18 can be removed from their bearings when it may be necessary to do so for any purpose. 5

26 represents a metal Washerfitting over the shaft 18 and bearing against the-inner I00 end of the sleeve 17, and between this washer 2G and the inner face of the arm 16 a rubber washer 27 is fitted over the shaft 18. Instead of a rubber washer-27 a coiled spring may be used. The object of the rubber washer or the spring is to permit the grinding-wheel to yield slightly during the operation of grinding. 28 represents a large sprocket-wheel mounted on a stub shaft 2f), projecting outwardly from the standard 11, and this sprocket-wheel is provided with a handle 30, by means of which it may be turned. 31 is a sprocket-chain running over the sprocketwhecls 2S and 523.

The supports for the article to be ground are indicated by 32. These supports consist of metal bars bent to ogee form, as clearly shown in the drawings, and are provided with feet 83, adapted to rest on the base-plate l and extend across the slot 2. Each foot is provided with an elongated opening 34, through which and the slot 2 a bolt 35 passes, and is provided at its lower end with a nut 36, by means of which the supports may be clamped firmly in position on the base-plate. The elongated openings 3i permit the supports to be adjusted toward or away from the grind ing-wheel 19, as circui'nstances may require, and by means of the slot 2 in the base-plate 1 the supports can be adjusted longitudinally of the base-plate to any desired position, as circumstances may require. The supports are so arranged that their upper ends project inwardly toward each other beyond their lower ends, and therefore when the lower end of the standard 11 is moved close up to the foot of either of the supports the upper end of the standard will be outside of the upper end of the support, and in this manner the extreme end portions of the article being ground can be easily reached by the grinding-wheel 19.

The upper ends of the supports 32, which form the holders for the article to be ground, are provided with spaced jaws 37 and 38, the space between them being sufficient to receive the ordinary knife i0 and the knife-bar e1 of a mowing or reaping machine. The jaw 38 is provided with ahead IE, which overhangs the space 39 between the two jaws and is adapted to engage the upper edge of the knifebar .41 when it is inserted in the holder. The head -12 also projects outwardly at each end beyond the jaw 38, and the support 32 is also widened or thickened immediately below the jaws 37 and 38, whereby the two side recesses I3 are formed in the head of the support.

it indicates a bracket which is bifurcated at one end to form the two cars t5, the ends of which are slightly upturned, as-indicated at 40, and these cars are adapted to fit into the recesses -13 in the head of the support. The bracket is also provided with a downwardly-projecting flange -17, adapted to bear against the face of the support 32 below the recesses i3. In this manner the bracket 4% is securely held in position on the head of the support and may be readily detached therefrom. The cars -16 are slightly rounded at their ends, as indicated at 18, to facilitate their insertion or removal into or from the recesses 43.

From the foregoing description it will be seen that I have provided a grinding-machine in which the grinding-wheel may be adjusted to grind on any desired angle or bevel; also, that the supports are so constructed that they admit of the extreme ends of the article, which project beyond them, being ground as readily as the intermediate portion. It is also apparent that an ordinary scythe-blade may be held between the jaws at the upper ends of the supports as well as the knife-bar and knives of an ordinary reaping or mowing machine and that these supports may be adjusted to suit knife-bars or scythe-blades of different lengths and shape.

I11 order to grind the guard-plates, the finger-bar is removed from the machine and the knife taken out. The brackets are attached in position on the supports, as alreadydescribed, and the finger-bar supported on them with the fingers lying horizontally. The grinding-wheel can operate between the fin gers, and the edges of the guard-plates can be ground without removing the plates from the fingers. In Figs. 9 and 10 the fingers are indicated by I9, the guard-plates by 50, and the fingenbar by 51. The finger-bar is of suffieient weight to maintain itself in position on the brackets with slight aid while the plates are being ground.

It will be understood that changes in the form, proportion, and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

Having thus described my invention,what I claim is 1. In a grinding-machine, the combination with the base and the grinding apparatus adjust-ably supported thereon, of supports for the article to be ground consisting of bars bent to ogee form to bring their ends out of vertical alinement, each bar having a foot to rest on said base, and means to adjust the supports longitudinally and transversely of the bar, substantially as described.

2. In a grinding-machine, a standard connected to the base of the machine by a universal joint, and having spaced arms at its upper ends, combined with a shaft having two portions of different diameters, the smaller end of said shaft being journaled in one of said arms, and the larger end fitting loosely within a sleeve journaled in the other arm, a connection between the shaft and sleeve whereby they rotate together and the sleeve may move longitudinally on the shaft, a grinding-wheel carried on the outer end of the sleeve, a spring fitted between the arms and engaging the inner end of the sleeve, a device to lock the shaft against longitudinal movement,and means to rotate the shaft and sleeve, substantially as described.

3. In a grinding-machiue, a standard connected to the base of the machine by a universal joint, and having spaced arms on its upper ends, combined with a sleeve j ournaled in one of the arms and carrying a grindingwheel at its outer end, a shaft fitting loosely in said sleeve and having a shouldered and reduced portion journaled in the other arm -with the shoulder bearing against the inner face of the said arm, a slot and-pinconnec tion between the shaft and sleeve, a sprocketwheel on the outer end of the reduced portion of the shaft and engaging the outer face of the arm, a locking-pin passing through the hub of the sprocket-wheel and the shaft, a large sprocket-wheel journaled on a stubshaft projecting from the standard and provided with a handle, and a chain running over said sprocket-wheels, substantially as described.

4. In a grinding-machine, the combination with'the base and a plate adjustably secured thereto, of a washer supported onsaid plate and having a concave recess, a standard having a rounded end seated in said recess, said lower end being also provided with an interior concave recess, a semispherical washer seated in the recess in the standard, a bolt passing through the said washers and plate with its head supported on the flat face of the washer within the standard, a nut on the bolt yond the jaws, the support being also widened below the jaws to form side recesses, combined with a bracket having spaced ears at one end adapted to be removably fitted into the said side recesses and having their ends upturned to engage the rear face of the said head, said bracket also having a downwardlyextending flange to engage the front face of 45 the support, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

JAMES ELMORE HARVEY.

lVitne'sses WM. HA VEY, D. M. FRENCH. 

